Alopecia Areata
What is alopecia areata? Alopecia areata is an idiopathic disorder characterized by the acute development of round or oval patches of hair loss (2-3 cm) without scarring of the scalp. It is estimated to affect 0.1 to 0.2% of the population at any time. Onset is usually in early adulthood. Patients are otherwise healthy. A [...]